Hypothesis Testing- 2 samples The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of three English courses with a standard deviation of 0.7. The females took an average of four English courses with a standard deviation of 1.0. Are the means statistically the same? (Use ? = 0.05) NOTE: If you are using a Student's t-distribution for the problem, including for paired data, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) Part 1) Sketch a picture of this situation. Label and scale the horizontal axis and shade the region(s) corresponding to the p-value. Part 2) Indicate the correct decision ("reject" or "do not reject" the null hypothesis), the reason for it, and write an appropriate conclusion. (i) Alpha (Enter an exact number as an integer, fraction, or decimal.) ? = Part 3) Explain how you determined which distribution to use. a) The t-distribution will be used because the samples are dependent. b) The t-distribution will be used because the samples are independent and the population standard deviation is not known. c) The standard normal distribution will be used because the samples are independent and the population standard deviation is known. d) The standard normal distribution will be used because the samples involve the difference in proportions
Hypothesis Testing- 2 samples
The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of three English courses with a standard deviation of 0.7. The females took an average of four English courses with a standard deviation of 1.0. Are the means statistically the same? (Use ? = 0.05) NOTE: If you are using a Student's t-distribution for the problem, including for paired data, you may assume that the underlying population is
Part 1) Sketch a picture of this situation. Label and scale the horizontal axis and shade the region(s) corresponding to the p-value.
Part 2) Indicate the correct decision ("reject" or "do not reject" the null hypothesis), the reason for it, and write an appropriate conclusion.
? =
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images